Method of soldering sheet-metal plates.



N0. 848,978. PATENTED APR. 2, 190v. J. DONOGHUE. METHOD OF SOLDBRING SHEET METAL PLATES.

APPLICATION FILED AUG.17, 1906.

Snwntoz q vihwaaea a- W W W iinrrnn s ra'rns earner enrich. JAMES DONOGHUE, F CLEVELAND, OHIO METHQD OF SQLDERENG SHEET METAL PLATES;

Specification of Letters Patent.

Patented April 2, 1 so;v

Application filed August 17,1906. Serial No. 331.011.

To all whom it may concern;

Be it known that l, JAMns Donoonun, a citizen of the United States, residing at Sleveland, in the county of Cuyahoga .and State of Dhio, have invented new and useful improvements Methods of Soldering Sheet-Metal Plates, of which the following is a specification.

This invention relates to a process of soldering sheet-metal plates, and is particulariy applicable to a method for producing the joints sheets used for eaves-troughs or roofs; but it is also applicable to sheetrnetal cans and vmi-ous other articles or structures.

it is common to snake an ordinary lockjoint in a tin gutter or roof by turning in the edges of the sheet metal and hooking the same together and then soldering the same on one side or between one fold and the adjacent portion of the sheet or plate, the seam being compressed or flattened, as usual. By this construction the body of one of the plates or sheets is not attached to the hook 1 portion of the other sheet, and when the sheetsv are exposed to heat or cold the expension and contraction will cause a bend at the seam, which frequently results in cracking at the bend of the upper sheet, which lets in water and causes a leaky seam. it is also known in the art to solder the seam on both sides; but this is expensive, because the plates after being soldered on one side have to be turned over and the operation repeated at all the seams, which ta es time and is doubly expensive.

It is the object of any nvention to solder a loch-sears such manner that all the parts of the searn are soldered together,

a seam which will be .waterprooi on both sides and which will prevent warping or cracking at the-hand and in which the soldering on all sides can he efiecte-d at a single operation.

r object is effected by the use of a pre pared or ribbon solder having the shape as seam, so to it within he "folds thereof.

invention is ill in accent-- g drawings, in which p re 1 is a sectional low of an ordinary loch-seam before being compressed and provided with the ribbon or strip of solder. Fig. 2 is a similar view of the compressed and completed seam. Fig. 3 is a perspective view of a piece of the solder strip ready for use.

in the drawings the sheet-metal plates are indicated at 6, and these are bent at the edges or sides, as at 7 to form hooks which interlock with each other in the usual manner..

The strip or ribbon ofsolder is indicated at 8, and it is formed or made in substantially "a 2 shape, so as to iill the space between all the ioldsof the upper and lower sheets. In

performing the method the edges are turned the seam and'liqueiies the solder, so that it adheres in the seam and fills the same completely, as indicated in Fig. 2. Now it will be seen'that with a seam so constructed the plates cannot warp or crack at the bend of the hooks, where the crack usually occurs, when either la or or plate is left unsoldered, because the solder extends beyond said bend on each plate. The solder fills all three of the folds or spaces between the hooks, forming threelayers, which-effectively prevent any leak. The ribbon-solder can. be prepared and shaped in advance, so that it can be q uiclrly applied to the joints. The strip of solder is substantially equal in width to the length of the convolutions oi the seam, and by proper manipulation and construction of the parts, together with a desirable thinness of the solder strip, running of the solder be; yond the limits of the seam can be prevented, which is advantageous in can and other work where agood appearance is desirable and where it is desired that little or none of the solder shall'he exposed to the contents of he can.

am aware that the seams of sheet-metal plates have heretofore been soldered by means of a solder or composition wire folded or placed within the seam before the heat and press r e are applied, and disclaim the same. Such a-rnethod has the objection that solder may or may not flow properly to. lill the seam and may or may not get the solder the right place. By the use of the folded strip disclosed hereinthe solder is a plied or located just where'it is wanted and fills the entire space and assuresa full and tight joint after eating and pressing.

I claim l 1. The method of soldering the seams of sheet nietal, consisting in folding the edges of the sheets to hook together, placing a ribbon of solder in the seam, said ribbon being fold ed in El shape to fit between the folds and around both of the said edges and then applying heat and ressure.

2. The metho of joining sheets of metal, consisting in bending the edges of the sheets to form hooks adapted to interlock to form a seam, inserting e strip of solder between the hooks, 'seid strip being folded te extend Meme around the edges of both of the sheets and beyond the bends thereof between the hook :5 portion of each sheet end-the body portion of the other, end then com ressin'g and heating the joint to melt the so .der end flatten the seem.

In testimony whereof I have signed my 2c name to this specification in the presence of two subscribing Witnesses.

JAMES DQNQGHUE.

Witnesses:

- JOHN A. Bow/menu's,

EDITH D. COMER. 

